Two parallel chords

The two parallel chords of the circle have the same length of 6 cm and are 8 cm apart. Calculate the radius of the circle.

Correct result:

r =  5 cm

Solution:

t=6 cm d=8 cm  d1=d/2=8/2=4 cm  r2=(t/2)2+d12  r=(t/2)2+d12=(6/2)2+42=5 cm



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